JSC2000-02568 (21 March 2000) --- Astronaut Richard A. Mastracchio, STS-106 mission specialist, awaits his turn to be dropped by a simulated parachute into water during an emergency bailout exercise in the Neutral Buoyancy Laboratory (NBL). Mastracchio, an alumnus of NASA's 1996 class of astronaut candidates, will join four other astronauts and two cosmonauts, representing the Russian Aviation and Space Agency, for a late summer visit to the International Space Station.